The components of the 455 and 428 will be more important than which motor you choose. Look at the heads--which heads, large valves heads for the 455, valve guide wear, number of valve jobs, compression. Which intake and carb do they have? Have the motors been bored previously? If so, is one of them already at 60 over?--which may be the limit. You can make either of them do what you wish. Look for cracks in the block and surface of the heads.
seconded! what the engines are as far as combination will determine your choice. also if they are rebuilt or rebuildable!
also most all pontiac and olds motors are in the 400 ft# range. an olds 455 rocket comes from the showroom with 475 ft# from the factory!
also note a basic principle of torque moves mass!
Last edited by drew67; 08/28/0705:58 PM.
Andy
due to budget cutbacks, the light at the end of the tunnel has been disconnected for non payment.
